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In a potentiometer experiment the balancing length with a cell is 560 cm. When an external resistance of 10Omega is connected in parallel to the cell, the balancing length changes by 60 cm. Find the internal resistance of the cell. |
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Answer» SOLUTION :BALANCING LENGTH `l_(1)=560 cm` Change in balancing length `(l_(1)-l_(2))=60cm` `560 -l_(2)=60""therefore l_(2)=500cm` `r=R((l_(1)-l_(2))/(l_(2)))RARR r=10xx(60)/(500)=(6)/(5)=1.2Omega` |
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